Calling the landlord has nothing in common. It depends on what kind of person he is, including renter and landlord. If the renter is a young man who has just gone to work and the landlord is also a young man who has just gone to work, then it is good to address his brothers and sisters, while if the landlord is older, he must call his uncle, aunt or grandparents, which means that the greater the age gap, he will show his seniority, and if it is not very important, he will use the address of his peers.
There is an old saying that a kind word warms three winters. The good word here is sweet mouth and pleasing speech! And between people, especially in China, we pay special attention to etiquette. Etiquette is one of the names of people. In addition to the clear appellation between relatives, it is the appellation between neighbors and strangers.